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A company operates four machines during three shifts each day. From production records, the data in the table below were collected. At the .05 level of significance test to determine if the number of breakdowns is independent of the shift.
MachineShift A B C D1 41 20 12 162 31 11 9 143 15 17 16 10
A. The number of breakdowns is dependent on the shift, because the test value 11.649 is less than the critical value of 12.592.B. The claim that the number of breakdowns is independent of the shift cannot be rejected, because the test value 11.649 is less than the critical value of 12.592.C. The number of breakdowns is dependent on the shift, because the p-value is .07.D. The number of breakdowns is independent of the shift, because the test value 12.592 is greater than the critical value of 11.649.
Conduct the hypothesis test and provide the test statistic, critical value and/or P- value and state the conclusion.
Discuss the underlying causes that might explain the trend. (c) Use Excel, MegaStat, or MINITAB to fit three trends (linear, quadratic, and exponential) to the time series.
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Does there seem to be any difference in the effects of the antibiotics on clearance of otitis media? Express your results in terms of relative risk (RR). Consider separated analyses for unilateral and bilateral cases. Also consider and analysis co..
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